Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

Page concordance

< >
Scan Original
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
< >
page |< < of 862 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="013/01/267.jpg" pagenum="237"/>
              of it: Then the Receiver muſt be taken
                <lb/>
              off from the Pump, that the upper Ori­
                <lb/>
              fice of the Cylinder remaining open, the
                <lb/>
              Air may freely ſucceed the Sucker, and
                <lb/>
              therefore readily yield to its motion
                <lb/>
              downward. </s>
              <s>This done, there muſt be
                <lb/>
              faſten'd to one of the Iron Teeth of the
                <lb/>
              Sucker, ſuch a weight as may juſt ſuffice
                <lb/>
              to draw it to the bottom of the Cylinder.
                <lb/>
              </s>
              <s>And having thus examin'd what weight is
                <lb/>
              neceſſary to draw down the Sucker, when
                <lb/>
              the Atmoſphere makes no other then the
                <lb/>
              ordinary reſiſtance of the Air againſt its
                <lb/>
              deſcent; the Sucker muſt be again forc'd
                <lb/>
              to the top of the Cylinder, whoſe upper
                <lb/>
              Orifice muſt now be exactly cloſed; and
                <lb/>
              then (the firſt weight remaining) we eaſi­
                <lb/>
              ly may, by hanging a Scale to the above­
                <lb/>
              mention'd Iron (that makes part of the
                <lb/>
              Sucker) caſt in known weights ſo long,
                <lb/>
              till in ſpight of the reluctancy of the At­
                <lb/>
              moſphere the Sucker be drawn down. </s>
              <s>For
                <lb/>
              to theſe weights in the Scale, that of the
                <lb/>
              Scale it ſelf being added, the ſum will give
                <lb/>
              us the weight of a Column of Air, equal
                <lb/>
              in Diameter to the Sucker, or to the ca­
                <lb/>
              vity of the Cylinder; and in length to
                <lb/>
              the heighth of the Atmoſphere. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg41"/>
                <emph type="italics"/>
              Experi­
                <lb/>
              ment
                <emph.end type="italics"/>
              33.</s>
            </p>
            <p type="main">
              <s>According to this method we did, ſince </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum